61371819 has 24 divisors (see below), whose sum is σ = 94938480. Its totient is φ = 38066688.

The previous prime is 61371811. The next prime is 61371823. The reversal of 61371819 is 91817316.

It is not a de Polignac number, because 61371819 - 2³ = 61371811 is a prime.

It is a super-2 number, since 2×61371819² = 7533000334737522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61371811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11364 + ... + 15870.

It is an arithmetic number, because the mean of its divisors is an integer number (3955770).

Almost surely, 2^61371819 is an apocalyptic number.

61371819 is a deficient number, since it is larger than the sum of its proper divisors (33566661).

61371819 is a wasteful number, since it uses less digits than its factorization.

61371819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619 (or 4616 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 61371819 is about 7834.0167857875. The cubic root of 61371819 is about 394.4479153625.

The spelling of 61371819 in words is "sixty-one million, three hundred seventy-one thousand, eight hundred nineteen".